Next: Step 4
Up: Near Optimal Multiple Sequence
Previous: Step 2
Again, only those gaps of ak are inserted into tk and
tk+1 that are not already present in tk.
Since each gap of sequence ak that is considered is
inserted into both, tk and tk+1, the score of this
alignment is still optimal, as gap against gap scores zero. In
Figure 9 the down arrows correspond to this step.
The dark rectangles represent the inserted gaps.
After those two steps the partial score of the MSA and the
score between sequences ak and ak+1 are both still